Charged-state lithium-ion batteries constructed using lithium-free binary fe/mn-based cathode materials

Abstract

A lithium-ion battery may include a lithium-free cathode, a lithiated anode, and a separator/electrolyte between the lithium-free cathode and the lithiated anode. The lithium-free cathode may include FeOF and MnO2. The FeOF may be in the form of nanorods, and the MnO2 may be in the form of monolayer nanosheets. The FeOF nanorods may be sandwiched or wrapped by the monolayer MnO2 nanosheets.

What is claimed is: 
     
         1 . A lithium-ion battery comprising:
 a lithium-free cathode;   a lithiated anode; and   a separator between the lithium-free cathode and the lithiated anode.   
     
     
         2 . The lithium-ion battery of  claim 1 , wherein the lithium-free cathode includes a composite of FeOF and MnO 2 . 
     
     
         3 . The lithium-ion battery of  claim 2 , wherein the FeOF is in the form of nanorods. 
     
     
         4 . The lithium-ion battery of  claim 2 , wherein the MnO 2  is in the form of monolayer nanosheets. 
     
     
         5 . The lithium-ion battery of  claim 2 , wherein the FeOF is in the form of nanorods, and the MnO 2  is in the form of monolayer nanosheets. 
     
     
         6 . The lithium-ion battery of  claim 5 , wherein the FeOF nanorods are sandwiched or wrapped by the monolayer MnO 2  nanosheets. 
     
     
         7 . The lithium-ion battery of  claim 1 , wherein the separator is an electrolyte. 
     
     
         8 . The lithium-ion battery of  claim 1 , wherein the lithiated anode includes at least one of Li, Li x Si, Li y C, and Li z M. 
     
     
         9 . The lithium-ion battery of  claim 1 , wherein the lithium-ion battery is assembled in a fully charged state. 
     
     
         10 . A composite for a lithium-ion battery, comprising:
 FeOF nanorods; and   monolayer MnO 2  nanosheets;   wherein the FeOF nanorods are sandwiched or wrapped by the monolayer MnO 2  nanosheets.   
     
     
         11 . The composite of  claim 10 , wherein the composite is in the form of a cathode of the lithium-ion battery. 
     
     
         12 . A method, comprising:
 synthesizing FeOF nanorods;   synthesizing monolayer MnO 2  nanosheets;   synthesizing a composite from the synthesized FeOF nanorods and the synthesized monolayer MnO 2  nanosheets.   
     
     
         13 . The method of  claim 12 , wherein synthesizing the composite includes: 
 dispersing the synthesized FeOF nanorods in water to form an FeOF solution;   dispersing the synthesized monolayer MnO 2  nanosheets in water to form an MnO 2  solution;   mixing the MnO 2  solution into the FeOF solution;   sonicating the mixture; and   heating the mixture.   
     
     
         14 . The method of  claim 12 , further comprising at least one of:
 washing the FeOF nanorods with deionized water and ethanol, and drying the washed FeOF nanorods in a vacuum; and   washing the monolayer MnO 2  nanosheets with water and ethanol.   
     
     
         15 . The method of  claim 13 , further comprising:
 collecting a dried sample; and   vacuum drying the sample.   
     
     
         16 . The method of  claim 12 , wherein the composite is in the form of a cathode. 
     
     
         17 . The method of  claim 16 , further comprising assembling the cathode with a lithiated anode and a separator between a lithium-free cathode and the lithiated anode to assemble a lithium-ion battery. 
     
     
         18 . The method of  claim 17 , wherein the separator is an electrolyte. 
     
     
         19 . The method of  claim 17 , wherein the lithiated anode includes at least one of Li, Li x Si, Li y C, and Li z M. 
     
     
         20 . The method of  claim 17 , wherein the lithium-ion battery is assembled in a fully charged state.